Answer:
I think CH2
Explanation:
I am not so sure
C H
×
2 1
How do I calculate the volume?
Answer:
2477.6 cm³
Explanation:
Volume = length x width x height
Label in cm³
How do scientists take instruments for measurement up to about 100,000 feet of
elevation?
A.jet aircraft
B.rockets
C.satellites
D.weather balloons
Answer:B
Explanation: i got it right
The scientists use weather balloons to measure up to about 100,000 feet of elevation. The correct option is D.
What is weather balloon?A weather balloon, also known as a sounding balloon, is a balloon that carries instruments aloft to transmit data on atmospheric pressure, temperature, humidity, and wind speed using a small, disposable measuring device known as a radiosonde.
Weather balloons can travel up to 24 miles (39 kilometres) before bursting, and a payload can land (via parachute) up to 75 miles (120 kilometres) away, depending on wind conditions at the launch site.
If the balloon is flexible, it will expand as it rises to lower air pressure altitudes.
To prevent them from popping, weather balloons are only partially filled when released.
Thus, the correct option is D.
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Why are intensive properties useful for identifying a substance?
A.They do not depend on the amount of substance you have.
B.They are chemical properties.
C.They are physical properties.
D.They describe the amount of substance you have.
The intensive properties are useful for identifying a substance because it does not depend upon the amount of substance present in the sample.
The points regarding properties are the following:
The intensive properties are defined as the properties which do not depend on the amount of the substance present in the matter but depend only on the type of the matter.The colour, solubility, texture, etc. are the intensive properties. •The properties which depend upon the amount of the substance present in the sample is called the extensive properties.The mass, density etc. are the extensive properties.Therefore, the correct answer is the A. They do not depend on the amount of substance you have.
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What's the major difference between carbon and other group IV elements, excluding allotropy
Answer:
Carbon has an ability of catenation which other group IV elements lack.
Explanation:
Catenation is the ability for an element to form multiple bonds with other elements leading rise to long chains of compounds.
An example is organic compounds.
[tex].[/tex]
and compound is a substance made of two or more chemicals that are chemically joined in a specific combination most matter is formed of ____
Answer:
elements
Explanation:
possibly elements
What is the rate law?
Answer: B
Explanation:
The rate law is the mathematical equation that describes how reactant concentration changes as a function of time. A law such as "Rate = k*[A]*[B]" means that, for each liter-equivalent of the reactant(s) A, there are k liters of reactant B. The law also dictates the molarity (and thus partial pressure) for each component in solution.
A pycnometer is a glass apparatus used for accurately determining the density of a liquid. When dry and empty, a certain pycnometer had a mass of 27.056 g. When filled with distilled water at 25.0°C, it weighed 36.773 g. When filled with chloroform (a liquid once used as an anesthetic before its toxic properties were known), the apparatus weighed 41.451 g. At 25.0°C, the density of water is 0.99704 g/mL
Complete Question
A pycnometer is a glass apparatus used for accurately determining the density of a liquid. When dry and empty, a certain pycnometer had a mass of 27.056 g. When filled with distilled water at 25.0°C, it weighed 36.773 g. When filled with chloroform (a liquid once used as an anesthetic before its toxic properties were known), the apparatus weighed 41.451 g. At 25.0°C, the density of water is 0.99704 g/mL
-What is the volume of the pycnometer (mL)
We have that the volume of the pycnometer in mL is
[tex]V=9.111mL[/tex]
From the Question we are told that
Pycnometer mass of [tex]m_p=27.056 g.[/tex]
Temperature [tex]T=25 \textdegree[/tex]
Pycnometer filled with distilled water [tex]m_{pf}= 36.773 g[/tex]
Apparatus weighed [tex]w=41.451 g[/tex]
Density of water [tex]\rho= 0.99704 g/mL[/tex]
Generally the equation for Density is mathematically given as
[tex]\rho=\frac{mass}{Volume}[/tex]
Since pycnometer is filled with water its volume can be defined by the volume of water in it
Therefore
Mass of water Pycnometer filled with distilled water-Pycnometer mass
[tex]M_w=36.773 -27.056\\\\M_w=9.084g[/tex]
Hence
[tex]V=\frac{9.084g}{0.99704 }[/tex]
[tex]V=9.111mL[/tex]
in conclusion
The volume of the Pycnometer in mL is
[tex]V=9.111mL[/tex]
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Determine the molecular and empirical formulas of the following:
a. the organic solvent benzene, which has six carbon atoms and six hydrogen atoms.
b. the compound silicon tetrachloride, which has a silicon atom and four chlorine atoms and is used in the manufacture of computer chips.
c. the reactive substance diborane, which has two boron atoms and six hydrogen atoms
d. the sugar called glucose, which has six carbon atoms, twelve hydrogen atoms, and six oxygen atoms.
Answer:
the answer is b im pretty sure
Explanation:
sorry if im wrong
The empirical formula for benzene is CH. The molecular formula for benzene is C[tex]_6[/tex]H[tex]_6[/tex]. The empirical formula is also known as the simplest basic formula.
What is molecular formula ?A molecular formula is indeed a formula derived with molecules that corresponds to the total number of distinct atoms in the molecule of a chemical. A subscript inside a molecular formula denotes the number for each type of atoms in the substance's molecule.
The empirical formula provides the most basic formula for something like a compound, defined by the ratio between subscripts of the formula's smallest entire number of constituents. It is also known as the simplest basic formula. An empirical formula is the formula of a material given with the least integer subscript. The empirical formula for benzene is CH. The molecular formula for benzene is C[tex]_6[/tex]H[tex]_6[/tex].
Therefore, the molecular formula for benzene is C[tex]_6[/tex]H[tex]_6[/tex].
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Rolls of foil are 300mm wide and 2.020mm thick. (The density of foil is 2.7 g/cm^3). What maximum length of foil can be made from 1.40 kg of foil?
Answer: 8556 mm, or 855.6 cm (8560 mm to 3 sig figs)
Explanation: Convert mm to cm by dividing by 10 (1cm/10mm)
Find the area of the foil face in cm^2 (30cm*0.2020cm) = 0.606 cm^2
Calculate the volume occupied by 1.40 kg of foil in cm^3. 1.40kg = 1400g
1.400g/(2.7 g/cm^3) = 518.5 cm^3 for 1.40 kg Au
Volume = Area (of the face) * Length
We want Length:
Length = Volume/Area
L = (518.5 cm^3/0.606 cm^2)
L = 855.6 cm (8556 mm) Round to 3 sig figs (856 cm and 8560 mm)
What is the volume of sodium hydroxide,
NaOH solution used to neutralised 25.00 mL
of 0.1500 M hydrocloric acid, HCI?
Answer:
sorry i don't know this question answeer
Jenna thinks a banana ripens faster when placed in a paper bag. She uses careful observation and experimentation to test her hypothesis 
A. Science
B.Pseudoscience
Please help me please
Answer:
Hope this helps.
Explanation:
See the picture. Hope it helps. Sorry if i was incorrect.
Would overheating be a stimulus or a
response?
Stimulus
Response
Answer:
stimulus response
Explanation:
its stimulus response
Which of these can be mined from earth and used as an energy source?
A.Get rid of the waste and extra fluid
B.Ureters
C.Coal
D.Bladder
coal
Which of these can be mined from earth and used as an energy source?
A.Get rid of the waste and extra fluid
B.Ureters
C.Coal
D.Bladder
ans is coal
What mass of oxygen is needed to complete the combustion of 8.80 x 10^-3 g of methane?
Explanation:
The chemical reaction that describes the combustion of methane is
[tex]\text{CH}_4 + 2\text{O}_2 \rightarrow \text{CO}_2 + 2\text{H}_2\text{O}[/tex]
We need to convert the mass of methane to moles:
[tex]0.00880\:\text{g} × \dfrac{1\:\text{mol CH}_4}{16.04\:\text{g}}[/tex]
[tex]= 5.49×10^{-4}\:\text{mol CH}_4[/tex]
Now use the molar ratios to determine the amount of oxygen used during the combustion:
[tex]5.49×10^{-4}\:\text{mol CH}_4×\left(\dfrac{2\:\text{mol O}_2}{1\:\text{mol CH}_4}\right)[/tex]
[tex] = 0.00110\:\text{mol O}_2[/tex]
Converting this to grams, we find that the mass of oxygen is
[tex]0.00110\:\text{mol O}_2×\left(\dfrac{15.999\:\text{g O}_2}{1\:\text{mol O}_2}\right)[/tex]
[tex] = 0.0176\:\text{g O}_2[/tex]
Mrs. Marlow's class is conducting an investigation of a mixture of sand, iron filings, and salt. They were told that they must separate the mixture into pure sand, pure iron filings, and pure salt using only the physical properties of each component using the following supplies:
bar magnet
filter paper
plastic funnel
water
What is the BEST procedure for the students to follow in order to separate the mixture?
A mixture can be separated by looking at the physical properties of the components of the mixture.
Since salt is soluble in water, water can be added to the mixture to dissolve the salt.
The bar magnet is now introduced in order to remove the iron filings since they are attracted by a magnet.
The solution is filtered to separate the sand from the salt solution.
Lastly, the salt solution is heated to dryness to drive away the water and obtain the solid salt.
Hence the mixture has been separated into its components using their individual physical properties. Option A is the correct answer.
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Answer:
is it a b c or d
Explanation:
formation of curd from milk is a chemical change
Answer:
yeah it's a chemical change because..Curd or Dahi is a fermented milk product formed by fermentation of milk by Lactic Acid bacteria to Lactic acid. Milk consists of globular proteins called casein. The curd forms because of the chemical reaction between the lactic acid bacteria and casein. ... The byproduct of ATP production is lactic acid.hope it helps..stay safe healthy and happy..what is Planck's constant ??
Planck's constant =
6.62607004 × 10-34 m2 kg / s
Explanation:
Step by Step explanation
The Planck constant, or Planck's constant, is a fundamental physical constant denoted h, and is of fundamental importance in quantum mechanics. A photon's energy is equal to its frequency multiplied by the Planck constant. Due to mass–energy equivalence, the Planck constant also relates mass to frequency. Wikipedia
Answer:
The Planck constant, or Planck's constant, is a fundamental physical constant denoted h, and is of fundamental importance in quantum mechanics. A photon's energy is equal to its frequency multiplied by the Planck constant. Due to mass–energy equivalence, the Planck constant also relates mass to frequency.
Plancks constant =
6.62607004 × 10-34 m2 kg / s
pls mark me as brainliestIf the density of carbon tetrachloride is 0.893 g/mL, and a sample has a volume of 9.29 mL, what is the mass?
Answer:
8.3g
Explanation:
d=m/v
m=d*v
m=0.893*9.29
m=8.3g
If the density of carbon tetrachloride is 0.893 g/mL. The mass of the compound will be 8.3 g.
What is mass?Mass is the quantity of matter. The mass can be calculated by multiplying density with the volume. The evaluation of how close something is packed. As the mass per unit volume, it has that definition.
Volume is the space occupied by the object. The liquid that weighs heavier is denser if you weigh two liquids with similar volumes or amounts. A substance that is less dense than water will float if it is gently introduced to the water's surface.
So the formula will be d = m / v
m = d x v
The density of carbon tetrachloride is 0.893 g/m
The volume of carbon tetrachloride is 9.29 mL
What the mass is?
Putting the value in the formula
m = 0.893 x 9.29 = 8.3g
Thus, the mass of the compound will be 8.3 g.
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Give two chemical properties of metals and one
equation each to
represent them
Answer:
Chemical Properties of Metals:
The density of metals is usually high.
The density of metals is usually high.Metals are malleable and ductile.
What is the order of macroscopic, submicroscopic, microscopic
Answer:
(from largest to smallest), macroscopic, microscopic, submicroscopic.
Explanation:
Explanation:
The correct order of these from largest to smallest is macroscopic, microscopic, and submicroscopic.
What is macroscopic?Macroscopic is a term used for things that can be easily seen by the eyes. They are of large size. Macroscopic are those items like rubber, mountains, a bottle, etc.
Microscopic items are those items that are minimum in size and can not be seen by eyes. They are seen by using microscopes. They are microorganisms, cells, cell organelle, etc.
Submicroscopic matters are those objects or substances that made up matter. They are present but can not be seen by eyes. They are electrons, protons, etc. so the correct order of them according to largest to smallest is macroscopic, microscopic, and submicroscopic.
Thus, the correct order is macroscopic, microscopic, and submicroscopic.
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(giving brainlist! What should a simplified model of a large molecule like glucose show?
Glucose is a carbohydrate and monosaccharide sugar molecule that is the energy source for organisms. The simplified model of a glucose molecule will show six carbon atoms, six oxygen atoms, and twelve hydrogen atoms.
What is glucose?Glucose is one of the monosaccharide sugar that is the most abundant energy source with a molecular formula of C₆H₁₂O₆. It consists of carbon, hydrogen, and oxygen atoms with a molecular mass of 180.156 g/mol.
It is a sugar-containing aldehydic group with a six-carbon making it aldohexoses. It is found in honey and fruits that are the source of the energy and regulates metabolic and cellular reactions.
Therefore, the molecular structure of glucose contains six carbon, twelve hydrogens, and six oxygen atoms.
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When multiplying 602.4 m by 3.72 m, which value determines the number of significant figures in the answer? Explain.
The values that determines the number of significant figures in the answer is 3.72
In mathematics and science, a significant figure refers to any figure that contributes to the degree of accuracy of a value that is being measured.
The value having the value having the least number of significant figures in a multiplication determines the number of significant figures in the answer.
In this case, 3.72 has the least number of significant figures hence it determines the number of significant figures in the answer.
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Answer:
3.72
Explanation:
3.72 has the least number of significant figures which means the number of significant figures is the answer.
A galvanic cell is constructed of one half cell in which a silver wire is placed into a 1.00 Maqueous solution of silver nitrate and the other half cell is made of a zinc wire in a 1.00 M aqueous solution of zinc nitrate. calculate gibbs free energy
Answer:
https://www.plps-k12.org/site/handlers/filedownload.ashx?moduleinstanceid=2482&dataid=3257&FileName=Ch%2017%20Electrochemistry%20Practice%20Problems%20I%20-%20key.pdf
Explanation: This is all the answers just go to this link to help is a bunch of pages to help and with answers on them too! Can I get brianliest plz
Is sodium hypochlorite a element, compound or a mixture?
Answer:
Sodium hypochlorite (commonly known in a dilute solution as bleach) is a chemical compound with the formula NaOCl or NaClO, comprising a sodium cation (Na+) and a hypochlorite anion (OCl−or ClO−). It may also be viewed as the sodium salt of hypochlorous acid.Chloric acid (HCIO3 is a neutral compound. The chlorine atom has what oxidation number?
Answer: 1
Explanation: one
Chloric acid is a neutral compound and an oxoacid with strong oxidizing power. In the compound (chloric acid), chlorine has an oxidation number of +5. Thus, option c is correct.
What is the oxidation number?The oxidation number is defined as electrons that are transferred by accepting and donating in a chemical bond formation. They denote the atoms that have gained and donated electrons by the positive and negative states.
As chloric acid is a neutral compound, the equivalent will be zero. The oxidation state of the hydrogen atom is generally taken as 1 and that of oxygen as -2 as it requires two more electrons in its valence shell.
The oxidation number will be estimated as,
HCIO₃ = 0
+1 + x + 3(-2) = 0
+1 + x - 6 = 0
x = + 6 - 1
x = + 5
Therefore, option c. chlorine has a +5 oxidation number in chloric acid.
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In which way are the scientific method and the design process the same?
Answer: A lot of the steps are the same.
Explanation:
Scientific Method
State your question
Do background research
Formulate your hypothesis, identify variables
Design experiment, establish procedure
Test your hypothesis by doing an experiment
Analyze your results and draw conclusions
Communicate results
Steps of The Scientific Method
Engineering Design Process
Define the problem
Do background research
Specify requirements
Create alternative solutions, choose the best one and develop it
Build a prototype
Test and redesign as necessary
Communicate results
Steps of The Engineering Design Process
Which of the following best describes an electron orbital? (electron orbital)
a) A circular path in which an electron "orbits” around a nucleus.
b) A location around the nucleus in a sphere where the electron is likely to be located.
c) An elliptical path around the nucleus.
d) The nucleus
Answer:
D
Explanation:
PLEASE, QUICKLY!!!!!!!!!
Which statement correctly describes the relationship between the volume of a gas and its temperature, in Kelvin, assuming pressure is held constant?
A. The relationship is directly proportional; as temperature increases, volume decreases in the same way.
B. The relationship in inversely proportional; as temperature increases, volume increases in the same way.
C. The relationship is inversely proportional; as temperature increases, volume decreases in the same way.
D. The relationship is directly proportional; as temperature increases, volume increases in the same way.
The statement that correctly describes the relationship between the volume of a gas and its temperature, in Kelvin, assuming pressure is held constant is "he relationship is directly proportional; as temperature increases, volume increases in the same way."
In mathematics, a direct proportion means that the two variables increase or decrease simultaneously. As one increases the other increases and vice versa.
According to Charles law; the volume of a given mass of gas is directly proportional to its volume at constant pressure.
As a result of this law, the correct statement is option D; The relationship is directly proportional; as temperature increases, volume increases in the same way.
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In this list, which substance can be classified as a chemical?
Complete Question is attached below
We have that the Chemical is
Salt
From the Question we have options
Salt
Sleep
Sold
Heat
Temperature
Generally among est the options
Salt is the only chemical present as it is made of Sodium and chlorine compound
NaCl joined by an ionic bond
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